Lock mechanism of ordnance



A. T. DAWSON AND G. T. BUCKHAM.

LOCK MECHANISM OF ORDNANCE.

APPLICATION FILED MAY 29, 191B.

1,337,308a Patented Apr- 20, 1920.

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ARTHUR TREVOR DAl/VSON AND GEORGE THOMAS BUCKHAM, OF WESTMINSTER, LONDON, ENGLAND, ASSIGNORS TO VICKERS LIMITED, OF WESTMINSTER,

ENGLAND.

LOCK MECHANISM: OF OBDNANCE.

Application filed May 29, 1918.

To all whom it may concern:

Be it known that we, Sir ARTHUR TREVOR Dawson, knight, and Sir GEORGE THOMAS BUOKHAM, knight, both subjects of the King of Great Britain, residing at Vickers House, Broadway, Westminster, in the county of London, England, have invented certain new and useful Improvements in or Belating to the Lock Mechanism of Ordnance, of which the following is a specification.

This invention relatesto ordnance lock mechanism of the kind having a sliding lock frame movable transversely to the axis of the gun in a box slide attached to the rear end of the axial vent bolt.

According to the invention the slides on which the lock frame moves are formed partly on the box slide and partly on the axial vent bolt so that the lock frame, when assembled, serves to retain the box slide in its correct position on the axial vent bolt.

In order that the said invention may be clearly understood and readily carried into effect we will describe the same more fully with reference to the accompanying drawings, in which Figure 1 is a rear elevation of the improved lock mechanism, the lock frame being adapted to move in a vertical path and being shown in the closed position.

Fig. 2 is a section taken approximately on the line 2, 2 of Fig. 1.

Fig. 3 is a section taken approximately on the line 3, 3 of Fig. 2, and

Fig. 4 is a section taken approximately on the line H of Fig. 1.

B is the box slide and C is the axial vent bolt to which the box slide is connected by a continuous screw thread or by interrupted collars in the usual manner. D is the lock frame, D is a lock frame operating handle pivoted at (Z to a bracket D attached to the lock frame, and d is a hook-shaped projection on the handle D for engaging in a re cess b in the box slide to hold the lock frame in the closed position. E is the firing hammer pivoted at e to the lock frame so as to move in a plane at right angles to the path of travel of the lock frame and E is a projection on the hammer E with an inclined surface on which projection an extension D of the handle D engages to retract the hammer when the handle is rocked aboutits pivot to disengage the projection cl from Specification of Letters Patent.

Patented Apr. 2o, ieao.

Serial No. 237,362.

its recess Z) prior to moving the lock frame to the open position.

The lock frame D is formed with longitudinal grooves D D adapted to engage with fins B 13 on the box slide B and also with fins C C on the axial vent bolt the latter fins forming continuations of the fins B B In this manner the lock frame serves as aforesaid to retain the box slide in its correct position on the axial vent bolt.

YVhat we claim and desire to secure by Letters Patent of the United States 1. In ordnance lock mechanism, the combination with the mushroom stem or axial vent bolt and the receiver or box slide attached thereto, of a wedge or look frame movable while in engagement With both the axial vent bolt and the box slide, and means whereby said lock frame by its said engagement directly forms a connection between the axial vent bolt and the box slide to prevent the latter from moving angularly on said bolt.

2. In ordnance lock mechanism, the combination with the mushroom stem or axial vent bolt and the receiver or box slide attached thereto, of a sliding wedge or look frame adapted to slide while in engagement with both the axial vent bolt and the box slide, and means whereby said lock frame by its said engagement directly forms a con nection between the axial vent bolt and the box slide to prevent the latter from moving angularly on said bolt.

3. In ordnance lock mechanism, the combination with the mushroom stem or axial vent bolt and the receiver or box slide attached thereto, of a sliding wedge or look frame movable transversely to the axis of the gun in said box slide and guides on the axial vent bolt with which the lock frame slidably engages to prevent angular movement of the box slide on the said bolt.

4. In ordnance lock mechanism, the combination with the mushroom stem or axial vent bolt and the receiver or box slide attached thereto, of a sliding wedge or look frame having longitudinal grooves, and fins on the box slide and on the axial vent bolt with which said grooves engage to prevent angular movement of the box slide on the said bolt.

In ordnance lock mechanism, the com-- bination with the elements claimed in claim 1 of a lock frame operating handle engaghandle for engaging in a recess in the box ing with part of the box slide when the lock slide to hold the lock frame in the closed po- 10 frame is in the closed position to hold the sition. latter in this position. In testimony whereof we afiix our signa- 6. In ordnance lock mechanism, the comtures. bination with the elements claimed in claim 1, of a lock frame operating handle pivoted ARTHUR TREVOR DAWSON. to the lock frame and a projection on this GEORGE THOMAS BUCKHAM. 

